US5758713A - Device for decoring cores of castings - Google Patents

Device for decoring cores of castings Download PDF

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Publication number
US5758713A
US5758713A US08/583,719 US58371996A US5758713A US 5758713 A US5758713 A US 5758713A US 58371996 A US58371996 A US 58371996A US 5758713 A US5758713 A US 5758713A
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US
United States
Prior art keywords
frame
fixed
clamping
vertical
longitudinal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US08/583,719
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English (en)
Inventor
Daniel Fallet
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
DIMAFOND- DISTRIBUTION ET INGENIERIE DE MATERIEL POUR LA FONDERIE
Dimafond Distribution et Ingenierie de Materiel pour la Fonderie
Original Assignee
Dimafond Distribution et Ingenierie de Materiel pour la Fonderie
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to FR9313208A priority Critical patent/FR2711931B1/fr
Priority to EP94402482A priority patent/EP0652063B1/de
Priority to ES94402482T priority patent/ES2141809T3/es
Priority to DE69421240T priority patent/DE69421240T2/de
Application filed by Dimafond Distribution et Ingenierie de Materiel pour la Fonderie filed Critical Dimafond Distribution et Ingenierie de Materiel pour la Fonderie
Priority to US08/583,719 priority patent/US5758713A/en
Priority to CA002166836A priority patent/CA2166836A1/en
Assigned to DIMAFOND- DISTRIBUTION ET INGENIERIE DE MATERIEL POUR LA FONDERIE reassignment DIMAFOND- DISTRIBUTION ET INGENIERIE DE MATERIEL POUR LA FONDERIE ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: FALLET, DANIEL
Application granted granted Critical
Publication of US5758713A publication Critical patent/US5758713A/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D29/00—Removing castings from moulds, not restricted to casting processes covered by a single main group; Removing cores; Handling ingots
    • B22D29/001—Removing cores
    • B22D29/005—Removing cores by vibrating or hammering
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D31/00—Cutting-off surplus material, e.g. gates; Cleaning and working on castings
    • B22D31/002—Cleaning, working on castings

Definitions

  • the present invention relates to an improved device for decoring cores of castings.
  • the hollow parts of a casting are usually cast around sand cores whose shapes are complementary to those of the hollow parts.
  • An object of the invention is to provide a simple and effective decoring device which permits obtaining a complete elimination of the cores, even in the case of a casting of complex shape such as a cylinder head of an internal combustion engine.
  • the invention therefore provides a device for decoring cores of castings, characterized in that it comprises a rigid frame having a vertical axis of symmetry forming a virtual pivot axis of the frame, defined by the intersection of longitudinal and transverse vertical median planes of the frame, said frame being connected to a fixed support by elastically deformable connecting means, the decoring device further comprising two clamping devices for clamping castings to be decored carried by two opposite ends of the frame and being aligned in the longitudinal median plane, and two out of balance motors which are connected to two opposite sides of the frame, have axes of rotation parallel to the axis of symmetry of the frame and aligned with said axis of symmetry in the transverse median plane, the motors being adapted in operation, to cause the frame to pivot about its virtual axis so that the centre of gravity of each casting to be decored describes a substantially horizontal and ellipsoidal path.
  • the means connecting the frame to the support comprise four cylindrical joints which have vertical axes, are transversely elastically deformable and are disposed symmetrically in pairs relative to the longitudinal and transverse vertical median planes.
  • each clamping device comprises a fixed jaw and a movable jaw defining confronting vertical clamping faces between which a casting to be decored is maintained;
  • the movable jaw is carried by at least one pneumatic chamber jack;
  • the fixed jaws and the movable jaws respectively of the two clamping devices are mounted in opposed relation relative to the longitudinal vertical median plane;
  • the median part of the frame on which the motors are fixed is narrower than the end parts of the frame carrying the clamping devices
  • the frame is provided with a framework comprising horizontal plates interconnected by vertical longitudinal webs;
  • each clamping device comprises two vertical end plates which are symmetrical relative to the longitudianl median plane and fixed to opposite edges of a rectangular notch formed in the corresponding ends of the horizontal plates of the framework, a first end plate constituting the fixed jaw of the clamping device, the second end plate forming a support for a fixed end of the pneumatic jack, the clamping device further comprising a third plate which is parallel to the fixed jaw, carried by the movable end of the pneummatic jack, and forms the movable jaw of the clamping device;
  • the fixed jaws of the clamping devices comprise through openings for means for hammering the castings held in the clamping device.
  • FIG. 1 is a perspective view of a decoring device according to the invention
  • FIG. 2 is a planned view of the decoring device of Fig. 1, and
  • FIG. 3 is a semi-sectional view taken on line 3--3 of FIG. 2 to a larger scale.
  • FIGS. 1 to 3 Shown in FIGS. 1 to 3 is a device according to the invention designated by the general reference numeral 10, for decoring cores of castings such as cylinder heads for internal combustion engines.
  • the device 10 is adapted to decore two castings at a time, only one of which is shown in FIG. 2 for reasons of clarity.
  • the casting shown in FIG. 2 is a cylinder head P provided with casting heads m.
  • the decoring device 10 is placed in a noise-muffling case 11 provided with closable access openings as shown in FIG. 1.
  • the device 10 comprises a rigid frame 12 having a generally elongate shape, with a vertical axis of symmetry X constituting a virtual axis of oscillation of the frame, as will be described in more detail hereinafter, defined by the intersection of a longitudinal vertical median plane L and a transverse vertical median plane T of the frame, these two planes being shown in dot-dash lines in Fig. 2.
  • the frame 12 is connected to a fixed support 14 by four cylindrical joints 16 which are of known type, have vertical axes, are transversely elastically deformable, and disposed symmetrically in pairs relative to the longitudinal and transverse vertical median planes L and T respectively.
  • the frame 12 is provided with a framework comprising three superimposed horizontal plates 18 which have generally identical shapes, are interconnected by two longitudinal vertical webs 20 welded to the horizontal plates 18, a single web 20 being shown in FIG. 3.
  • the width of the horizontal plates 18 is smaller in their median part than in their end parts, the latter having rectangular notches 22 which are open on the side remote from the axis of symmetry X.
  • the decoring device 10 further comprises two devices 24 for clamping the parts or castings to be decored which are carried by two ends of the frame 12 and are aligned in the longitudianl median plane L, and two out of balance motors 26 of known type fixed in the conventional manner to the two opposite sides of the frame defined by the narrow median parts of the horizintal plates 18.
  • the axes of rotation R of these motors 26 are parallel to the axis of symmetry X of the frame 12 and aligned with this axis of symmetry in the transverse median plane T.
  • Each clamping device 24 is arranged between two vertical end plates 28, 30 which are symmetrical relative to the longitudinal median plane L and fixed to opposite edges of the notches 22.
  • a first end plate 28 constitutes a fixed clamping jaw and a second end plate 30 forms a support for at least one pneumatic chamber jack 32 of known type, for example that sold under the name "PNEURIDE" by the company PARKER.
  • the pneumatic jack 32 is provided with a fixed end connected to the support 30 and a movable end carrying a plate 34 parallel to the two end plates 28, 30 and forming a movable clamping jaw.
  • the jaws 28, 34 therefore define confronting vertical clamping faces between which a part or casting P to be decored is maintained.
  • the fixed jaws 28 and the movable jaws 34 respectively of the two clamping devices 24 are mounted in opposition to each other relative to the longitudinal median plane L.
  • each clamping device 24 comprises two pneumatic chamber jacks 32 carrying the movable jaw 34 and aligned vertically.
  • the number of pneumatic jacks employed in a clamping device depends on the weight of the casting to be decored.
  • Horizontal grills 36 are disposed between the lower end of the end plates 28, 30 of the clamping devices. These grills 36 constitute supports facilitating the positioning and the withdrawal of the castings to be decored and permit the passage under the effect of gravity of the fragments of the cores which are detached from these castings.
  • the fixed jaw of a clamping device has openings 38 defining passages for known means for hammering the casting P.
  • hammering means comprise for example a pneumatic hammer 40 such as that shown in FIG. 2 which is adapted to strike a part of the casting to be decored disposed in alignment with the openings 38, this part being constituted for example by the feed heads m in one piece with the casting.
  • a plate may be interposed between the heads m and the hammer 40, in particular when these heads are relatively fragile.
  • each of the castings P to be decored is clamped between the jaws 28, 34 of the corresponding clamping devices 24 by supplying compressed air to the pneumatic jacks 32.
  • each casting P is hammered by means of the pneumatic hammer 40 in accordance with a known procedure.
  • the rotation of the motors 26 has for effect to cause the frame 12 to oscillate about its virtual axis X by elastically deforming the joints 16 substantially in a horizontal plane so that the centre of gravity of each casting P to be decored oscillates by describing a substantially horizontal and ellipsoidal path whose major axis extends transversly relative to the frame 12.
  • the effect of the oscillations is to completely disintegrate the cores without any fragment remaining in the hollows of the castings.
  • the power of the out of balance motors 26 is so adapted that the amplitude of the oscillations of the castings to be decored, measured along the major axis of the ellipsoidal path are between about 12 and 16 mm.
  • each out of balance motor has a power of about 5 kW
  • each pneumatic jack is supplied with compressed air having a pressure of about 2 to 5 bars so as to be capable of decoring castings of various weights.
  • the amplitude of the oscillations of the centre of gravity of the castings to be decored, measured along the major axis of the ellipsoidal path, is about 14 mm, namely 7 mm on each side of the position of rest of the centre of gravity, for a frequency of 1,500 oscillations/min., i.e. 1,500 alternations/min. about the position of rest of the centre of gravity.
  • the amplitude and the frequency of the oscillations of the castings to be decored may vary in accordance with the setting of the out of balance motors. Further, the power of these motors is chosen in accordance with the weights of the castings to be decored.
  • the invention has many advantages.
  • the device according to the invention permits decoring two castings at a time by subjecting the latter to vibrations transmitted by the frame carrying these castings without using the conventional transmission means employing links and cranks which are complex and fragile.
  • the decoring device according to the invention is very strong and reliable.
  • the vibrations produced by the decoring device according to the invention have amplitudes and frequencies exceeding those obtained in conventional devices, whereby it is possible to completely disintegrate the cores without leaving any fragment inside the castings.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Cleaning In General (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Vehicle Body Suspensions (AREA)
US08/583,719 1993-11-05 1996-01-05 Device for decoring cores of castings Expired - Fee Related US5758713A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
FR9313208A FR2711931B1 (fr) 1993-11-05 1993-11-05 Dispositif perfectionné de débourrage de noyaux de coulée de pièces de fonderie.
EP94402482A EP0652063B1 (de) 1993-11-05 1994-11-03 Vorrichtung zum Entkernen von Gussstücken
ES94402482T ES2141809T3 (es) 1993-11-05 1994-11-03 Dispositivo para el desbarbado de noyos de colada de piezas de fundicion.
DE69421240T DE69421240T2 (de) 1993-11-05 1994-11-03 Vorrichtung zum Entkernen von Gussstücken
US08/583,719 US5758713A (en) 1993-11-05 1996-01-05 Device for decoring cores of castings
CA002166836A CA2166836A1 (en) 1993-11-05 1996-01-09 Device for decoring cores of castings

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9313208A FR2711931B1 (fr) 1993-11-05 1993-11-05 Dispositif perfectionné de débourrage de noyaux de coulée de pièces de fonderie.
US08/583,719 US5758713A (en) 1993-11-05 1996-01-05 Device for decoring cores of castings
CA002166836A CA2166836A1 (en) 1993-11-05 1996-01-09 Device for decoring cores of castings

Publications (1)

Publication Number Publication Date
US5758713A true US5758713A (en) 1998-06-02

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
US08/583,719 Expired - Fee Related US5758713A (en) 1993-11-05 1996-01-05 Device for decoring cores of castings

Country Status (6)

Country Link
US (1) US5758713A (de)
EP (1) EP0652063B1 (de)
CA (1) CA2166836A1 (de)
DE (1) DE69421240T2 (de)
ES (1) ES2141809T3 (de)
FR (1) FR2711931B1 (de)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2348839B (en) * 1999-04-17 2003-10-08 Yoshitaka Aoyama Casting sand shake-out method and its apparatus
US6644382B1 (en) * 1997-12-13 2003-11-11 Yoshitaka Aoyama Casting sand shake-out method and its apparatus
AT411971B (de) * 2002-07-26 2004-08-26 Wolfgang Ing Schneebauer Vorrichtung zum entkernen von gussstücken
US20040230193A1 (en) * 2003-04-18 2004-11-18 Cheung Kenneth M.C. Fixation device
US20060272792A1 (en) * 2003-01-23 2006-12-07 Marcel Massin Automated decoring system and decoring device
CN100346906C (zh) * 2005-03-24 2007-11-07 北京铝镁泰和铸机设备科技有限公司 一种分段式凸轮脱型装置及其应用方法
US8287538B2 (en) 2008-01-14 2012-10-16 Conventus Orthopaedics, Inc. Apparatus and methods for fracture repair
US8906022B2 (en) 2010-03-08 2014-12-09 Conventus Orthopaedics, Inc. Apparatus and methods for securing a bone implant
US8961518B2 (en) 2010-01-20 2015-02-24 Conventus Orthopaedics, Inc. Apparatus and methods for bone access and cavity preparation
US9730739B2 (en) 2010-01-15 2017-08-15 Conventus Orthopaedics, Inc. Rotary-rigid orthopaedic rod
US10022132B2 (en) 2013-12-12 2018-07-17 Conventus Orthopaedics, Inc. Tissue displacement tools and methods
US10918426B2 (en) 2017-07-04 2021-02-16 Conventus Orthopaedics, Inc. Apparatus and methods for treatment of a bone
US11596419B2 (en) 2017-03-09 2023-03-07 Flower Orthopedics Corporation Plating depth gauge and countersink instrument

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITTO20011180A1 (it) * 2001-12-18 2003-06-18 Global Foundry Systems Srl Dispositivo per rimuovere le anime dai getti di fusione.
FR2901161B1 (fr) * 2006-05-17 2009-03-06 Disa Serf Dispositif de debourrage de pieces de fonderies comprenant un espace d'accueil des pieces defini sous forme d'un espace ferme.
FR2907039B1 (fr) * 2006-10-16 2008-12-26 Disa Serf Dispositif de debourrage de pieces de fonderie incluant une poutre.
SI24307A (sl) 2013-03-29 2014-09-30 Rc Simit D.O.O. Vrtanje peščenih jeder iz ulitkov
AT517133B1 (de) * 2015-04-17 2017-09-15 Fill Gmbh Entkernmaschine/Rüttelmaschine mit verbessertem Antrieb
CN112439891A (zh) * 2020-11-28 2021-03-05 德清鸿捷铸机有限公司 一种铸造用多维振动落砂机

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3239262A1 (de) * 1982-10-23 1984-04-26 Alb. Klein Gmbh & Co Kg, 5241 Niederfischbach Verfahren und vorrichtung zum entkernen von gussstuecken
WO1985002137A1 (en) * 1983-11-19 1985-05-23 Mirbeth, Rudolf Apparatus for removing cores of castings by vibratory oscillations
EP0200860A1 (de) * 1985-04-09 1986-11-12 Georg Fischer Aktiengesellschaft Einrichtung zum Entkernen von Gussteilen
US4643243A (en) * 1985-08-05 1987-02-17 Seaton-Ssk Engineering Co., Inc. Machine for impact cleaning casting
US5213150A (en) * 1990-11-07 1993-05-25 Doehler-Jarvis Limited Partnership Core knock-out fixture
US5460219A (en) * 1991-02-07 1995-10-24 Massin Limited Company Method and devices for decoring castings

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3239262A1 (de) * 1982-10-23 1984-04-26 Alb. Klein Gmbh & Co Kg, 5241 Niederfischbach Verfahren und vorrichtung zum entkernen von gussstuecken
WO1985002137A1 (en) * 1983-11-19 1985-05-23 Mirbeth, Rudolf Apparatus for removing cores of castings by vibratory oscillations
EP0144031A1 (de) * 1983-11-19 1985-06-12 Mirbeth, Rudolf Vorrichtung zum Entkernen von Gussstücken durch Vibrationsschwingungen
EP0200860A1 (de) * 1985-04-09 1986-11-12 Georg Fischer Aktiengesellschaft Einrichtung zum Entkernen von Gussteilen
US4643243A (en) * 1985-08-05 1987-02-17 Seaton-Ssk Engineering Co., Inc. Machine for impact cleaning casting
US5213150A (en) * 1990-11-07 1993-05-25 Doehler-Jarvis Limited Partnership Core knock-out fixture
US5460219A (en) * 1991-02-07 1995-10-24 Massin Limited Company Method and devices for decoring castings

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6644382B1 (en) * 1997-12-13 2003-11-11 Yoshitaka Aoyama Casting sand shake-out method and its apparatus
GB2348839B (en) * 1999-04-17 2003-10-08 Yoshitaka Aoyama Casting sand shake-out method and its apparatus
AT411971B (de) * 2002-07-26 2004-08-26 Wolfgang Ing Schneebauer Vorrichtung zum entkernen von gussstücken
US20060272792A1 (en) * 2003-01-23 2006-12-07 Marcel Massin Automated decoring system and decoring device
US20040230193A1 (en) * 2003-04-18 2004-11-18 Cheung Kenneth M.C. Fixation device
US7695471B2 (en) * 2003-04-18 2010-04-13 The University Of Hong Kong Fixation device
CN100346906C (zh) * 2005-03-24 2007-11-07 北京铝镁泰和铸机设备科技有限公司 一种分段式凸轮脱型装置及其应用方法
US9517093B2 (en) 2008-01-14 2016-12-13 Conventus Orthopaedics, Inc. Apparatus and methods for fracture repair
US9788870B2 (en) 2008-01-14 2017-10-17 Conventus Orthopaedics, Inc. Apparatus and methods for fracture repair
US11399878B2 (en) 2008-01-14 2022-08-02 Conventus Orthopaedics, Inc. Apparatus and methods for fracture repair
US8287538B2 (en) 2008-01-14 2012-10-16 Conventus Orthopaedics, Inc. Apparatus and methods for fracture repair
US10603087B2 (en) 2008-01-14 2020-03-31 Conventus Orthopaedics, Inc. Apparatus and methods for fracture repair
US9730739B2 (en) 2010-01-15 2017-08-15 Conventus Orthopaedics, Inc. Rotary-rigid orthopaedic rod
US9848889B2 (en) 2010-01-20 2017-12-26 Conventus Orthopaedics, Inc. Apparatus and methods for bone access and cavity preparation
US8961518B2 (en) 2010-01-20 2015-02-24 Conventus Orthopaedics, Inc. Apparatus and methods for bone access and cavity preparation
US9993277B2 (en) 2010-03-08 2018-06-12 Conventus Orthopaedics, Inc. Apparatus and methods for securing a bone implant
US8906022B2 (en) 2010-03-08 2014-12-09 Conventus Orthopaedics, Inc. Apparatus and methods for securing a bone implant
US10022132B2 (en) 2013-12-12 2018-07-17 Conventus Orthopaedics, Inc. Tissue displacement tools and methods
US10076342B2 (en) 2013-12-12 2018-09-18 Conventus Orthopaedics, Inc. Tissue displacement tools and methods
US11596419B2 (en) 2017-03-09 2023-03-07 Flower Orthopedics Corporation Plating depth gauge and countersink instrument
US10918426B2 (en) 2017-07-04 2021-02-16 Conventus Orthopaedics, Inc. Apparatus and methods for treatment of a bone

Also Published As

Publication number Publication date
EP0652063B1 (de) 1999-10-20
DE69421240T2 (de) 2000-07-13
EP0652063A1 (de) 1995-05-10
DE69421240D1 (de) 1999-11-25
CA2166836A1 (en) 1997-07-10
FR2711931B1 (fr) 1996-02-09
ES2141809T3 (es) 2000-04-01
FR2711931A1 (fr) 1995-05-12

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